Automatic pump for rubber tires.



PATENTED AUG. 13, 1907.

0. D. ROUSSEAU.

AUTOMATIC PUMP FORRUBBER TIRES. v

APPLICATION IQLED APR. 5, 190B.

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D. ROUSS OF SEYMOUR, IOWA] AUTOZ /EATIG PUMP FOR R'UEZEEE TXEEE.

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To all whom "it may concern:

Be it known that I, ORIEL l). ROUSSEAU, a, citizen of the United States, residing at Seymour, in the county of Wayne and State of Iowa, have invented a and useful Automatic Pump for Rubber 'lires, zc, of which the following is a specification. V

The object of this invention is to provide improved means for inflating a pneun'mtic tire automatically during the use of said tire.

A further object of this invention is to provide improved'me'ans for maintaining the desired degree of inflation of pneumatic tires during the use and operation of said tires. v

invention consists in the construction, arrangement and combination of elements hereinafter set forth, pointed out in my claims stud illustrated lay the accomnyingmlruwing, in which- Figure l. is a longitudinal section of a multiple valve devi e employed by Inc in equipping pneumatic tires. Fig. 2 is a detail sectional view of a portion of the multiple valve device. Fig. 3 is a detail elevation, partly in section, illustrating the mounting of :1V multiple valve device in a, pneumatic tire.

.In the construction of the deviceand its mounting as shown, the numeral 10 designates s valve-chamber, consisting of a tire section that has shoulders at its ends and is preferably made of yielding, compressible,

. elastic, resilient material, such as India-rubber vulcanized. The valve chamber preferably is circular in cross-section and of a length exceeding its diameter, and curved throughout its length on the some radius as the tire to which it is adapted to be applied. End portions 11, 12, of the valve-chamber 10, are reduced in diameter und are adapted to be inserted in open end portions of a tire 13, said tire being of the single-tube variety or type and vulcanized or cemented to said reduced end portions to form airtight joints therewith. Aperturcs are formed in and longitudinally of the end portions of the valve-chamber l and ufford communication between the interior; of said valve-chamber and the interior of the tire 13. Valve-tubes, or casings, 14, l are mounted rigidly in the apertures in the end portions and contain egress check-valves l6, 17 nor- Iiially held seated by pressure from the tire. Bearing; plares i8, 19 are mounted opposite each other within and longitudinally of the valve-chamber l0,-[ond said plutcs are held separated and normally hold the valvechziinbcr expanded, l y means of springs 20,"'2l. interposed between and eng- 1;; at their ends with said pistes. A valve-tube 22 is fixed to the plate 18 and extends through the inner portion of tho valvecham-- hcr 10. A collar or jam-nut 23 is mounted on the,

z'nc P2 mid tends to l lznprcss the inner portion or all all the valvechumlm ll) against the hearing Specification of Letters "fotezit. Anplicstien filed ayril 5,190. Serial Ho. 313.3

;estentes Au re, 1907;

plate 18 and prevent leakage at that poiut from the "chamber. The valve-tube 22 contains an ingress check-valve 24 normally held seated by a spring 25 and aided by pressure from the valve-cherub er. When mounted for use, the valve-tube 22 extends inwardly through the rim 26-05 the wheel, and the inner end portion of said tube fitted 'with a screen 27 to exclude foreign substances having a. tendency to clog the valves.

in practical use, at each revolution 01' the wheel'and tire, the outer portion. of the valve'chambcr 10 is broug' lltiu'contect with the surface over which the wheel is advanced and the weight of the wheel and its lozad'slightly compresses said volve-chcmber and forces is out oiiit into'the tire. When the wheel advances sufficiently to relax the conipressiou of the valve-chamber, said chamber expands, through its normal resilience aided by the springs 20, 21, and

sucks in air through the tube 22, the valves 16, 17 preventing returnoriair from the tire to said chamber. Successive compressions of the valve-chamber dischilrgcs more air so the tire, the valve 24 preventing escape of air from the chamber to the atmosphere. Continuous travel. oi'the wheel and tire under a load, effects an ll'lfiittlOHDl the tire -to the degree at which the back-pressure iromthe tire equals the/force exerted by the compressing load, and thereafter the automatic action of the valve device maintains the desired 2. In a tire, the combination of'a.single-tuhe, open at its I ends,' a valve-chamber consisting of a. tire section having shoulde s at its ends to engage the ends of the tube, ex pansive springs in said valvechumber, a valve controlling communication between said chamberand the ends of the tire to which the valve-chamber is lifted and fixed, ands valve controlling communication between said chamber and Y the atinosphcrc.

3. The combination of a singlotube tire section open zit its ends,'n valve-chamber consisting of a tire section having shoulders atlts ends fitted and fixed to the ends of the tire, a valve controlling communication between said valve chamber section and. tire, hour-in; plates in said valvec'number, expansive springs between said bcurlugqilatcs, a valve-tube affording communication bctwccn said chamber and the zitmospherc, a valve in said vulvwtnbc. and a screen in the outer end portion of said valve-tube.

ORHCL l). ROUSSI'IAT Witnesses A. M. ,Lrcxrm'.

C. l, liAl'lJCKHAN, 

